Fix #6525: Make sure file is opened in LazyThumbnail processor (#6529)

app/models/concerns/account_avatar.rb

@@ -8,7 +8,7 @@ module AccountAvatar
   class_methods do
     def avatar_styles(file)
       styles = { original: { geometry: '120x120#', file_geometry_parser: FastGeometryParser } }
-      styles[:static] = { format: 'png', convert_options: '-coalesce', file_geometry_parser: FastGeometryParser } if file.content_type == 'image/gif'
+      styles[:static] = { geometry: '120x120#', format: 'png', convert_options: '-coalesce', file_geometry_parser: FastGeometryParser } if file.content_type == 'image/gif'
       styles
     end
 

app/models/concerns/account_header.rb

@@ -8,7 +8,7 @@ module AccountHeader
   class_methods do
     def header_styles(file)
       styles = { original: { geometry: '700x335#', file_geometry_parser: FastGeometryParser } }
-      styles[:static] = { format: 'png', convert_options: '-coalesce', file_geometry_parser: FastGeometryParser } if file.content_type == 'image/gif'
+      styles[:static] = { geometry: '700x335#', format: 'png', convert_options: '-coalesce', file_geometry_parser: FastGeometryParser } if file.content_type == 'image/gif'
       styles
     end
 

lib/paperclip/lazy_thumbnail.rb

@@ -3,7 +3,7 @@
 module Paperclip
   class LazyThumbnail < Paperclip::Thumbnail
     def make
-      return @file unless needs_convert?
+      return File.open(@file.path) unless needs_convert?
       Paperclip::Thumbnail.make(file, options, attachment)
     end